2022 Manitoba Workplace Safety and Health Act and Regulation

Drill stem testing
41.19(1) During drill stem testing, an employer must ensure that
(a) monitoring for the presence of hydrogen sulfide and
hydrocarbons takes place;
(b) the hydrogen sulfide monitor is
(i) capable of detecting hydrogen sulfide at a concentration
equal to the occupational exposure limit for hydrogen
sulfide established under Part 36 (Chemical and Biological
Substances),
(ii) calibrated and tested before use, and
(iii) properly maintained; and

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Workplace Safety And Health Regulation
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(c) if hydrogen sulfide or hydrocarbons are present at levels that
may pose a risk to a worker’s safety or health, the formation
fluids in the drill stem are displaced with drilling fluid and
circulated to a flare pit or holding tank that is at least 25 m
from the well.
41.19(2) An employer must ensure that, if test fluid recovery is encountered
during darkness,
(a) recovered liquids are reverse circulated; or
(b) if reversed circulation is not practicable because the pump-
out sub has failed, additional drill pipe is not pulled and
disconnected until daylight.
Well swabbing operations
41.20(1) An employer must ensure that during well swabbing operations
(a) workers anchor auxiliary swabbing units securely against
movement;
(b) fluids are piped directly to a battery, skid tank, mobile trailer
or tank truck; and
(c) the battery, skid tank, mobile trailer or tank truck is at least 25
m from the well bore.
41.20(2) An employer must ensure that if fluids are piped to a tank truck
during well swabbing operations,
(a) the engine of the truck is shut off; and
(b) the driver or any other person is not in the cab of the truck
while fluids are transferred.